Weighing-machine.



W. SCALES.

WEIGHXNG' MACHINE. APPLIGATIQN FILED PEB. 29, 1904.1*

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E .S. SCALES. WEIGHING MACHINE. APPLICATION FILED P2129, 1904.

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Si U W. S. SCALES. WEIGIHNG MACHINE.'

APPLIGATION FILED PEB. 29, 1904.

Patented June 8, 1909.

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W. S. SCALES. WEIGHING Mmmm.

MPLXCATION HLED PEB. 29, 1904. v I

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tunen STATES lini'rinn onirica;

WILLIAM S. SCALES, BOSTON, MASSACHUSETTS, ASSIGNOR, BY MESNEASSIGNMENTS, TO

CITY TRUST COMPANY, A CORPORATION OF MASSACHUSETTS.

Waremme-MACHINE.

Specification of Letters Patent.

Patented J une 8, 1909.-

Application filed. February 29, 1904. Serial No. 195,775.

To all whom it may concern:

V Be it known that I, WILLIAM S. SCALES, of Boston, in the county ofSuffolk and State of. Massachusetts, have invented certain new material,and accurately weighing the delivered material so that each iillqdpackage shall be of a predetermined weight.

The invention is especially intended to be employed in the form of apackaging .machine in which each package is partially filled from onechute or hopper and receives the remainder of its supply from anotherchute or hopper, but it is adapted in many of its features to beemployed in the form of a simple packaging-machine inwhich only onefeed-chute is used.

Packaging machines have been or constructed in which rapidity combinedwith accuracy was partially attained by first measuring into the packagea quantity of material somewhat less than the total required, andsubsequently adding suiiicient material to bring it to apredeterminedweight, the measuring' of material into one package andthe addition ofmaterial into another package taking place `simultaneously. Machmes havealso been devised whereby the package was first partially lled, withoutregard to weight or measure, so long as the amount of material deliveredtherein was less than the quantity required in the filled package, afterwhich the required amount was added to bring it to a predeterminedweight. This was accomplished by means of a supply chute, the outlet towhich was opened a predetermined time, during which a receptacle waspartially iilled; the amount of ,material owing through the outletvbeing determined approxiproposed mately by the duration of the timeofsaid o ening. It has been found, in practice, t at measuring certainclasses of materials is objectionable for various reasons. In thepractical construction of these machines for initially measuring thematerial,

-the measuring devices frequently crusl. and

injure material such as. coffee-beans, and grind the crushed matell'ml,such as sugar, lnto its operative parts to an extent sullicient to clogthem and prevent the accurate 5 referred to type, is, in practice, souncertain f- With'some materials that a large margin has to be allowedbetween the average first load; or supply, and the required amount,which results in greatly decreasing the output of the machine. f Thepresent machine is'illustrated as embodied in a machine in which thematerial is weighed from two different sources of supply into differentpackages, the same package, for the purpose of overcomingthe objectionsto the two types of machines hereinbefore referred to. By insurin a morenearly uniform supply from the igirst feed-chute and therefore reducingthe amount to be sup lied by thesmall stream from the second c nte, thespeed of the machine is increased Without impairing its accuracy. Themain feature of my invention consists in two weighing scales upon whichpackages to be lled are successively moved, each scale having anindependent feed chute Awith means whereby a package is partially fillednearly up to its required weight on one scale,V whence it is moved tothe second scale where it receives i ts final supply, the firstfeed-chute having a delivery port-much larger than the second one.Another feature of the invention consists of package-moving mechanismland means whereby the movement of the packages is controlled by thejoint action of the two I scales. i

My invention further consists in numeri ous other features ofconstruction and ar;- 1 rangement of parts which will be moreparticularly descrlbed and claimed. I On the accompanying drawings,which l illustrate one embodiment of the invention` i Figure 1represents in front elevation a packaging machine. Fig. 2 represents aplan i view of the same. Fig. 3 represents a side ,l elevation of themachine. y Fig. 4 represents an enlarged section on the line 4-4 of Fig.2. Fig. 5 represents in detail a connection bel tween the package-movingmechanism and l the devices which trip the gate opening and closingmechanism to cause the opening of the gates for the delivery of thematerial into the packages. Fig. el represents in detail the connectionsbeteren the scales and the gate and successively into and is especiallydesigned 2 camel opening and closing mechanism, and also the connectionsbetween the gate opening and closing mechanism and therefore the scaleswith the package-moving mechanism in consequence of which the'packagesare moved 0H of and onto the scale-pans at the proper time and in propersequence. Fig. 7 represente in plan view the mechanism for effecting theoperation of the package-moving devices. Fig. Sis a side elevation ofthe same, and illustrates the operation ofthe tripping mechanism whichcontrols the operation of the package-moving devices.

desire to have it understood that the terms which I emplogV in thespecification and succeeding claims are for the purpose of descriptionand not of limitation, and further that the invention is not limited tothe particular combination lof elements or parts which l. have seen fitto employ, and that it Amay be embodied in other 'forms withoutdeparture from its spirit and 'scope` It has been brieiiy stated thatthe invention contemplates the employment of two weighing mechanisms,each comprising a fee -chute with Vgate opening and closing -mechanism,and escale which controls the operation of the gate-opening and closingdevices; and that package-moving mechanism -is providedby means of whicha package into which has been roughly weighed a predeterkfminedamount ofmaterial is carried from the 'primary weighing mechanism to the secondryweighing mechanism by which a sui'hfcient addition of material isaccurately made to bring the package to exact weight. The

#primary Weighing mechanism is constructed in'such manner that a largestream of mate- -riai is permitted to flow into the package to 404 itapproximately to the desired final Weight, and the secondary Weighingmechanism `is so formed that the material which it adds te the packageis delivered in a thin or f .drip stream.

The machine, as a whole, is 4preferably so constructed `that theaddition ofv material by the drip stream to bring the package to itsexact predetermined Weight takes approximately no longer, than thedelivery of the material from the primary Weighingmechanism into itsscale. inas-V much asa package cannot be moved freni,

the primary weighing mechanism to the sec `ondar Weighing mechanismuntil the scale-v pan o the secondary weighing mechanism is emptied, thepackage-moving mechanism is so related to both weighing mechanisms th atthe transfer of the package takes place only after the delivery ofmaterial into the packages in both Weighing mechanisms has beencompleted.

Referring to the drawings, it will he seen that the machine therein.illustrated is pro-. vided with a main frame indicated as a whole; ati0, from which 'rises a su erstructure or framework indicated as a v.ole at 11, and

consisting of an upright or standard with connected braces. To thisupright are attached by brackets or supports the two hop- 'parts of themachine are actuated from a shaft 3,0, which is journaled in the uprightor superstructure of the machine, and which is driven by a pulley 31,erably located directly in the rear of the hoppers, so as to be'conveniently disposed with relation to the gate-opening and closingmechanisms to simplify the connections between said mechanisms and saidshaft.

The gates and their operating mechanism.---- lThe gates or cut-offs ofthe two hoppers may be formed in any suitable way, to open and close thedelivery ports 15. In Fig. 4, the gates 1,6 and 17 are illustrated asconnected to shafts 18 and-19, respectively, to which ane attached therocker-arms 21 22, respectively. Loosely mounted on the Shaft yof thestirrer device of each chute or hopper, vis athreearmed lever 23, thearms of which are connected with the arms 21 23 by links 24 25.

This shaft is pref- By rocking the three-armedv lever23'in one ydirection or the other, the gates are opened and closed, as the case maybe. gate-opening and closing mechanisms, there are located loosely uponthe shaft two path- For the cams 32 and 320, respectively, each having a32, has upon its hub 36 a circumferential' flange 37 carrying a pawl 38whichat the proper time is permitted to engagewith a' Y ratchet fastupon the shaft 30; AThe cam 320 has o.. similar hub 40, a iange 4.11, apawl 42 (not seen in Fig. 6,) to engage a-ratchet 43,' likewise fastupon the 'shaft 30. The pawl 38 has a laterally-projecting pin '44,there being a similar'pin 45 on the pawl 42. These pins are ada ted tobe engaged by mechanism to be su scquently described for the purpose ofmoving thepawls out of engagement with their respective ratchets toeffect a cessation of rotation of the cams 32 and 320, and ytherebymaintain the gates in the'primary and secondary Weighing mechanisrnopenlpr closed, as tpewcase may be.

` age from the 0 sufficient maar inasmuch as this mechanism is dependentupon the operation of the scales, and also upon the operation of thepackagemoving mechanism, I will reserve its description un- .til saidscales and said package-moving mechanism have been' described. Packagemoving and transferring mechaniem--The means for primarily feedingunfilled cartons to the machine comprises an endless belt or carrier asshown in Fi s. 1 and 2. It is supported in part by a ro l 51 journaledupon a stud-shaft The cartons in their movement toward the machine arestoppedby a bracket 53, as illustrated in said figures.

The package-movingmechanism to be described operates to remove a cartonor packcarrier 50 and to transmit it across the face of the machine intothe scalepan of the primary weighing mechanism, and subsequently bysuccessive steps to feed the approximatelyilled package to the scalepanof the secondary weighing mechanism to complete the filling of thepackage by the addition thereto of sufficient material to bring it tothe exact weight, and thereafter remove the package and transfer it to adeliveringcarrier 54, which is illustrated as supported in part by aroll 55 on a shaft 56. As the package is carried toward the machine bythe belt 50, it is held against lateral movement to the left by guides57- until it is in position to be fed laterally to the primaryscale-pan, as will be explained.

The package moving or mechanism comprises a long bar 60 provided withforwardly projecting equally-spaced fingers 61 62 63 64 and 65, thedistance between each pair of adjacent fingers being to receive acarton. The bar 6() is supported upon the upper end of an arm '66,terminating at its lower end in a hub which transferring is keyed toslide upon a rock-shaft 67 journaled in the front of the The shaft 67 isrocked by 4ich is connected la pitman 70 entering a cam=j ath in a cam7l shown in `Fig'. 6 as secured y a screw on a shaft 72, see Figs.13,71and 8.) The said shaft 72 is main frame 10.

69 having a roll 9 uiinaled in the mainframe 10 in the rear of the shaft'67 .and it-receives ower at certrin times from the 'shaft 30 y meansofY a sprocket-chain 73 and sprocket-wheels 74 75 on :said shafts 30 and72, respectively. The cam 71 carries a pawl 76 which is adapted to beheld by a spring 77 in. engagement with a ratchet 78 upon a sleeve 781loose on the shaft '72 and having keyed upon it the sprocket-wheel 75s`o that when the cam and ratchet are thus connected, the rotation ofthe sleeve 781 and ratchet 78 will by reason o'f the fcrmation of thecam-path, effect an oseilatory Imovement of the arm 68 and I rereoreofthe arm 66 of the package-mov mg or transferring mechanisml andA willalso an arm 68, to`

effect a rotation of the shaft 72.

76 carries a laterally projecting pin 79 with which may be engaged apivoted trip 80 to The pawl extends a roll 82 on a lever 83 fulcrumed atits rear end at84 on the frame and having its front end forked to engagethe head of the arm 66. Whenever the cam 71 is permitted to rotate, thecam S1 likewise rotates but thetwo cams are so related to each otherthat the package-moving bar 60 is moved forward, then to the left adistance equal to the space between two of the fingers, then rearward,and then to the right to its 'initial starting point, as illustrated bythe arrows in Fig. 5, which illustrate the movement of the arm 66. Afterthe carriage-moving bar has been forced forward and then moved to theleft to transfer the packages, upon its rearward movement it is causedto actuate certain trips. to permit the opening of the gates in theprimary and secondary mechanism.

Trip meczanismfor controlling the opening ofthe gczfes--Referring now tol' ies. 6 and 7, it will be observed that journale in brackets in theupright 11 are two rock-shafts `85 S6 respectively. These tworock-shafts 85 86 are` located in proximity to the cams 32 and 329, asbest shown in figs. 1 andA 6. Said shafts are held by springs 87 inposition to cause trips 88 89 on the uplper ends thereof to proj-ectinto the path of t the pawls-BS 44 which have described, so that whenthe have rotated until the ins 44 45 are engaged by said trips, said paws are 'lifted out of engagement with the ratchets 39 and to stop. thecams in position with the gates 16 and 17 of the two weighing mechanismsclosed to cut off' the supply of material. The lower ends ofthe shafts85 86 are provided with firms 90 91 respectively, carrying dependingpins 92 and 93. These pins are located in the ath of hooks 94 95projecting rearwar y from 'the bar 60, so that when the said bar 6()moves forward, the hooks engage the pins 92 93, rock the shafts 85 86and move the trips 88 89 out of the way of the pins 44- 45 so that thepawls 38 and 42 may engage thc ratchets 39 and 43 to cause the openingof the gates of the primary and secondary weighing mechanisms. The cams32 and 320 are formed with a dwell, so that, although the e pins 44 45of been previously cams 32 and 320 4.scale-pans is pivotally supportedupon the (l l said lever 114 is adapted to be held against the end ofthe trip 111, sonlovng as the sealebeam 100 is depressed, andthe longerend of fer an unfilled ackage to the scale-pan or' the `primary weig imgmechanism, and a parbelow said pan 103 when said pan is dopressed.

, stop-screw 113. A long lever 114, i'ulcruined intermediate oi' itsends upon a stud 115, is

.cams are started during the torward move ment of the transferring bar60, yet the gates are not o en lor a period of time during which sai baris moved to the left to transtially lilled package to the scale-pan ol'the secondary weighing machine. The weighing mechanisms of the twomachines will now be described.

-lleighing mechanisms-The two scalebeams are indicatedl respectively at100 and 101. They carry 'pans 102 103 respectively and at their' outerends are provided with weights 104 105. Each scale-beam is pivotedbetween its ends upon a support 106, so that each pan is directly belowthc deliveryport oi one of the hoppers. Each of the front end of itsbeam, and is rovided with a shank `107 connected by a ink 108' with apivot on the: standard. 106, so that as the scalean moves u) and down,it -is maintaine in horizonte position. Between the two scale-pans is aflat table or plate 109 upon which the. partially-filled packages restas they are being transferred from a pan 102 to the pan 103'. Preferablythe upperwf stretch of the belt 50 is in a plane slightly above thescale-pan 102 when it is in a raised position. The said table isslightly below said pan when it is in a depressed position, said pan 103is below said table when it is in its raised position, and said belt 54is slightly The purpose of this is to permit the accurate'tiansler ofthe cartons or packages throng.vv the machin e'. l, Tripping mechanismcontrolled by the' scales-Tripping devices are provided for Vthe purposeof controlling the gate opening and closing mechanisms and torcontrolling the operation of the package-moving mechan anism. Thesetripping'devices are. also combined with mechanism Ifor controlling thetuation ofthe stirrers in the hoppers.

Referring now to Figs. 1, 3 and 6, it will be seen that the scale-beam100 is provided at its rear end with a hook 110 which takes under theend of a trip 111 iulerumed at 112 in a bracket at the rear ol' themachine. rlhe outward movement of the trip is stopped at anypredetermined points by an adjustable connected at its upper end by alink 117 (shown in dotted lines in Fig. o) but shown in end view with anarm 118 in Fig. 3, keyed to a shaft 119 arran 'ed with its axis fromliront to rear ofthe mac iine. The lower end of the the said trip isheld downward.. To the forward end of theshaft 112 isiteyed a: trip-arm120 which is adapted to engage the pin 44 of the pawl and disengage saidpaWl from the ratchet 39` of the gate opening and closing mechanism 'ofthe primary hopper. A spring 121 tends to throw the said stop-arm 120 tothe right by rocking the shaft, but this is prevented when the lower endof the lever 114 bears against the trip111. 'It will be seen, however,that when material is delivered to the package to canse the scale-pan tobe depressed, the rear end of the scale-beam rises to lower the shorterend of the trip 111 so as to free the lower end of the lever 114, and

permit the-spring 121 to rock the shaft' 119 and release the pawl 38, topermit it to engage the ratchet and thereby effect a rota# tion et thecam 32 until the said pin 44 is tripped by the stop 88. The distancel towhich the cam rotates after it isdisengaged by the trip 120 until it isengagedby the trip 88 is su'llicient to effect a closure of the gate.From this description, it will be apparent that the opening of therimary hopper is controlled by the forwar movement of thepackage-feeding bar, whereas the closing of the gates is controlled bythe scale-beam or the weight of material delivered to the package. Thesecondary weighing mechanism is similarly controlled by mechanism'substanL tially like that described, including atrip 122, a hook 123 onthe scale-beam 101, a sto 124, a long lever 125 (similar to that at 114fulcrnrned at 126 and connected at its u perend by a link 127, and anarm 128 on a s aft 129 (similar to that at 119). The forward end of theshaft 129 carries a trip-arm 130 which is operated to engage, or whichisnormally held in, the path of the in of the pawl, but which is movedby t e tension of the spring 131 to release said pawl and permit it toengage the ratchet 43 to effect the closing of the gate of the secondaryhopper. These two feeding mechanisms, as thus far described, areindependent in so far as they control the two gate-closing mechanisms,so that the gates of the primary weighing mechanism may be closed whilethe gates of the secondary weighing mechanism remains open, and viceversa. l Trip resetting meczaaism. -For the pur pose oi resetting thetrips 111.and 122, the Vtwo levers 114 and 125 are provided at theirlower ends with headed studs 140 and 141 respectively, which extendthrough slots '142' and 143 respectively, of a bar 144, arranged in therear of said levers. This bar 144 is shown in .plan view in Fig. 5 asbeing loosel engaged by the shorter arm 146 of a bell, crank leverfulcrumed at 147 on a suitable bracket 148 attached to thesuperstructure Y not actuated until after the levers 125 and 114 indposition to be Aen'- z' 76, .so as to permit said awl lto engage thegagged by the ytrips 122 an 111 respectively. TA ismovement ofthebar144is effected bya slide 149, Whose rea: end is connected tothe longerarm 150 of the bell-crank and whose forward end .is bent so as to beengaged by the rearward movement of thc'arm 6601i' the package-movingmechanism, as graphically represented in Fig. 5.

t will be recalled that thc arm 66 is tilted forward, as indicated bythe arrow w, then moves laterally, as indicated by the arrow a', then`rearwardly as shown by the arrow y, and then laterally to the righttoits initial starting-point, .as indicated by the arrow z.

The slide 149 is so located that it is engaged during the rearwardmovement. of the arm 66, and consequently the resetting bar 144 is theweighted packages have been removed from the scale-pan, and they havebeen replaced by an empty carton on the rimary weighing scale, and apartially fille carton on the secondary weighing scale. The scaleansboth rise as the empty and partially filled vcartons are .placedthereon, and the rear ends of the scale-beams consequently are depressedso that as the slide 149 moves rearward and .moves thebar 144 to theright, the said bar, .by reason .of its pin-,and-slot engagement withthelevcrs 114 and 125, moves the lower end of said levers to the .thetrips 111 and 122 to both drop into the osition in which the trip 122is-illustrated in ig. 6. The movement ofthe bar 144 draws botbtrip-arms120 and 130 into positions to engage the pins 44 and 45 of the pawls 38and 42, hereinbefore described.

' Mechanismfor .controlling the operation of package transfcwvingmechaaism-`The mechanism will now be described by means of which theackage-transferring mechanism is ccntrolle by the tri mechanism.Reference may be had to gi s. 1, 3, 6 and 8. Rigidly connected tothe saft 119 is an arm 160shown in dotted lines in Fig. 6, and in .fuil linesin Fig. 2. This arm extends laterally to the left from the shaft 119 andit is formed vin its end .with a segmental slot 161. There is loose uponthe said shaft a similar arm 162v having a slot 168. Thelast-meniolldarm 162 has connected to it at right angles another arm 164arranged at right an- .gles thereto, the .upper end' of which isconnected bythe link 165 with an upstanding arm 166, keyed to the shaft129. The two arms 162 163 lie side by side and through the 'slots 161163 therein extends a stud '167, project-mgl from the u per end of avertical rod 1.68, the lower en of which is connected to .the end of thepivoted trip80, previously .described and shown in Fig. 8." 'A spring169 tends to draw the rod 168 downward and to raise theoperative endofthe .trip 80- for the purpose of releasing the pin .79 on the paivlright so as to permit the pin 79 on the pawl 76.

ratchet 78 and thereby e ect the rotation of the shaft ,72 to cause .theoperation of the .package-transferring mechanism. When the twotrip-.arms .120 ,130 are in their activepositions in the path of the,-pins 44 45 on the pawls 38 42 of the gate opening and closingmechanism', the two arms 160 162 are both raised so as vto elevate therod 168 and hold the trip 80 with its end in position to engage eithertrip-arm to an inactive position by its respective scale to cause the o.erationof the gate-closing mechanism for t at scale, does not ermit thetrip ing ofthe bar 168, since the )(bar would sti be held raised by theother arm. But when both arms 160 and 162 are depressed, by the removalof both trip-arms 120 and 180 to the position in which the arm 120 isillustrated in Fig. 6, then the bar 168 will be depressed, the operativeend of the trip'80 will be raised, the pawl 76 will engage the ,ratchet78, andthe shaft 72 will be rotated one complete .rotation to eii'ectI.the transfer of the packages. And as said package-,moving mechanism isop- The operation of erated, it resets the trip-arms 118 128, as

.previously described, and the resetting of said arms causes theresetting of the trip 8() to the connections described so that when theshaft 72 has com leted one rotation, .the .pawl 76 is disengagedp fromthe'ratchct .78 by the nip so.

Sttrrer o ercting mechanisms-Jn addition to the meclihnism thusdescribed, mechanism is employed for agitating the stirrers in the 'Itis desired that thesev stirrers should v.be operated only when the'hoppers 12 and 13.

gates are open, and to accomplish this result, the stirrer mechanism iscontrolled by the gate opening and closing mechanism. As the stirrermechanisms and the contro devices therefor are alike, only one of themneed be described in detail.

The shaft 14 in the hopper is formed with stirrer-arms 180. It protectsthrough the hopper and is provided with a sprocket-wheel 181 driven by achain 182 from a sprocketwheel 183 loose on the shaft (see Fig. 3). Oneface of the sprocket-wheel 188 is internally beveled (not shown) to beengaged by a clutch-member.184,keyed to slide upon the shaft 30. Thisclutch-member 184 is groovcd as at 185, to receive an arrow or pin uponthe end of a lever 186, pivoted intermediate of its ends upon a support187, forming a part of the upper framework or superstructure of themachine. A Likewise pvoted upon said support is a bell crank whose arm188 is connected to the gate opening and closing bar 34. The other arm189 is connected to 'a bar 190, which is passed through a block l1.91pivoted upon therear end of the lever 186. This bar 190 has twoadjustable blocks 192 193, and there is a spring 194 which is placedbetween the block 193 and the block 191 on the lever 186. ln virtue ofthis construction,

when the gate-o erating bar 34 is moved torward, to open tlie gate, thebell-crank. lever 188 is swung about its pivot to oscillate the lever186 and yieldingly force the clutch 184 into engagement with thesprocket-wheel 183 to connect said sprocket: wheel with the shaft 30 andeffect a rotation of the stirrer shaft 14, so long as the, gates remainopen. When the gates are closed, the clutch 184 is disengaged from thesprocket-wheel'lSS and the agitation or stirring ofthe material in thehopper immediat'elyceases.

O eration of the mcMne.- The operation of t e machine may be brieflyrehearsed as follows Starting with the assumption that u on the twoscale-pans are packaged-into W ch material is`being delivered topartially fill one, and completely ll the other, thel depression of thetwo scale-pans,l as the two packages come to their proper weight',operates the two trips 111 122. Thereupon the two trip-arms 120 and 130are immediately disengaged from the pawl-pins 44 and 45 and the camsv32andl 320 immediately commence to close the-gates of the two weighingmechanisms. The operation of the trip-arms 120 and 130 is immediatelyfollowed by the tripping of the connecting rod168 and the operation oi'the trip 80 to release the pawl 76 and permit it .to connect thevratchet 78 with the shaft 72.` The shalt 72 immediately rotates andcauses the loperation of the, packagemoving mechanism. As thepackage-moving bar moves forward, the lhooks 94 95 engage the pins 92 93onthe arms 90,91, and move the trips 88 and 89 out ofthe path ofthepawl-pins 44 and 45 to permit the rotation of the cams 32 and 320,and cause the gates to be opened, for it will be recalled that if thetrip-arms 120 andi releasey the pawlpins 44 and 45, the camsv32and20rotate to the gate-closed position, whereupon said pins 44 and 45 areengaged by the trips 88 and 89. To continue the description of the oeration of the package-moving mechanism, tile bar 60 moves forward sothat its lingers 6165 engage lplackages on the belt 50, on the rimaryweig 'ng scale, and on the table 109. Il'he bar 60 then moves to theleft, so as to advance all of said packages one step to the left. This.removes the partially filled ackage from the primary scale, the competely filled package from the secondary scale, replaces the partiallylilled package by an empty carton from the carrier 50, and the comletely filled and weighed package by a artially filled carton from thetable 109. he completely weighed and filled package is thrown upon thebelt 54 which removes it from thek machine. 'As the bar 60 movesrearward, the arm 66 engages the slide 149 and effects the resetting ofthe trips 111 1.22

120 and 130, and thereiore'the trip 80.

the two'hoppers. As soon as the gates are fully 'r opened, thepawl-pins44 45 are stopped by the trip-arms 120 130 which have been moved toproper position for this purpose by the resetting mechanism. Materialcontinues tov iiow from the hoppers into the cartons, and as soon aseach carton receives its proper weight,

the scale-pan drops by the weight-off the delivered material, and the.trip-,mechanism 'causes' the closing of the gates, as described.

Having thus explained the nature of the invention, and described a wayof constructing and using the same, although without attempting to setforth all of the forms in which it may be made, or all of the modes of``its use, l declare that what l claim is: h

1. A weighing machine comprising aprimary weighing mechanism and anindependent secondary weighing mechanism, in combination with mechanismfor automatically transferring packages simultaneously and individuallysuccessively to and from said weighing mechanisms.

2. A weighing machine comprising a primary weighing mechanism forweighing into a package less than the desired ultimate iii'eight ofmaterial, secondary weighing mechanism for adding to each partiallyfilled package suiticient'material to bring it to said desired weight,and mechanism iortransferring packages simultaneously and individuallysuccessively to said weighing mechanisms.

lOl)

3. A weighing machine comprising a pri- -mary weighing mechanism, asecondary weighing mechanism, mechanism for transferring packagessimultaneously and in Succession to said weighing mechanisms, and

means bywhicli both said weighing mechi' 4rnisms control the operationof said packagetransl' eirin'g mechanism.

4. A package-weighing machine comprising two weighing scales adjusted toweigh Slightly diilerent loads, a feed hopper provided with a cut-oilfor each scales, means whereby the cut-oils are opened so thatthere isfeed simultaneously from both hoppers,Y

means whereby the closure' ot each cut-oli is controlled by the poisingof its 'cooperating scales, and means for automatically transferringeach package from the lesser-weight, to p the greater-weight, scales.

5 A package-weighing machine com rising means whereby at regulatedinterva S of time `a plurality of separated `paclmges in tandem aresimultaneously advanced through` a fixed distance along a predeteriinedpat way; two Weighing scales adjusted to weigh slightly different oadsand so distributed along said athway that a single package is upon the patorm of each scales during each' iso mi tha e: nu of t?.

a feed hopper provided w1 means wherebjvf, W1 il? h@ pflckages rast,each cut-01'? is @6eme Yfhelfby the closule 0 lain-ed E the poising of Av f ary hopper which dis. 'mo he package, z

sxmultaneousy 'luto dll cut-@l for 'me primary mpg the weight 0I apmtmUj/ lsd of? for the secmldmy lol h@ Weight of L filled package, anda raasemng mechanism @,uz'cled in C 2li-.ion by the Weights of fpackage, a cut- 3pm cont-rolled by

